.page.active{
    width: 75%;
    height: 80%;
    margin: 0 auto;
}
/* 书本小盒子 */
.small{
    width: 400px;
    height: 200px;
    display: inline-block;
    background-color: rgb(246, 246, 246);
    padding: 10px;
    margin-left: 5%;
    margin-bottom: 5px;
    margin-top: 2%;
    margin-right:5%;
    vertical-align: middle;
}
.container{
    margin: 0 auto;
    width: 40%;
    height: 20%;
    text-align: center;
}
.neirong{
    display: inline-block;
    font-size: 22px;
    margin: 10px 30px ;
}
.neirong a:hover{
    border-bottom: solid #3b82f6 5px;
}
.book{
    margin: 0 auto;
    width: 70%;
    height: 45px;
    text-align: center;
}
.shuji{
    display: inline-block;
    /* margin: 2% 8% 2% 4%; */
    padding-left: 70px;
    padding-top: 6px;
    padding-right: 70px;
}
.small img{
    width: 170px;
    height: 200px;
    float: left;
}
.small h2{
    float: left;
    /* padding: 15px; */
}
.small p{
    float: left;
}
.neirong a{
text-decoration: none;
color: black;
padding: 5px 5px 10px 10px;
}
.shuji a{
font-size: 22px;
text-decoration: none;
color: black;
padding: 5px 5px 10px 10px;
}
.small a{
text-decoration: none;
color: black;
padding: 5px 5px 10px 10px;
}
/* .lunboo a{
text-decoration: none;
color: black;
padding: 5px 5px 10px 10px;
} */
.shuji a:hover{
border-bottom: solid #3b82f6 5px;
}
.neirong a:visited{
color: black;
}
.shuji a:visited{
color: black;
}
.small img{
    transition: box-shadow 0.5s;
}
.small img:hover{
    
transform: scale(1.2,1.2);
    /* box-shadow: 5px 5px 5px #383838,5px -5px 5px #383838,-5px 5px 5px #383838, -5px -5px 5px #383838; */
}
/* 自适应 */
@media screen and (max-width:460px) {
ul{
  width: 100%;
  margin-left: -20px;
}
.container{
    width: 100%;
}
.neirong{
    margin: 10px 10px;
}
.book{
    width: 100%;
}
.shuji{
    padding-left: 10px;
    margin: 2px 2px;
    padding-right: 20px;
}
.big{
   margin-top: 20px;
}
.small{
    width: 350px;
    margin-left: -5%;
}
.small img{
    width: 120px;
    height: 150px;
}
.footer{
    width: 100%;
}
.footer-right{
    margin-left: -40px;
}
}
@media screen and (max-width:767px) {
ul{
  width: 100%;
  margin-left: -40px;
}
.container{
    width: 100%;
    margin-left:-20px ;
}
.book{
    width: 100%;
}
.shuji{
    padding-left: 5px;
    margin-left:2px ;
}
.footer{
    width: 100%;
}
.footer-right{
    margin-left: -40px;
}
}
@media screen and (max-width:991px) {
ul{
  width: 100%;
  margin-left: -40px;
}
.container{
    width: 100%;
}
.book{
    width: 100%;
}
.shuji{
    padding-left: 5px;
    padding-right:5px;
}
}
/* js换页 */
.btn{
text-align: center;
}
button{
width: 50px;
height: 30px;
}
.page {
display: none; /* 默认隐藏所有页面 */
width: 75%;
height: 80%;
margin: 0 auto;
}
.page.active {
display: block; /* 激活时显示页面 */
}
